Title: Fluctuation-induced switching and ideal mean-field transition in a modulated col
Speaker: Wonho Jhe Seoul National University
Time: 2012-02-22 16:00-2012-02-22 17:00
Venue: FIT 1-222
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Abstract:

 We show that an atomic system in a periodically modulated optical trap displays an ideal mean-field symmetry-breaking transition. The symmetry is broken with respect to time translation by the modulation period. We describe experimental observations and develop a full microscopic theory of the observed critical phenomena. The transition is explained as resulting from the interplay of the long-range interatomic interaction and nonequilibrium fluctuations in the strongly modulated system. The observations, including anomalous fluctuations in the symmetry broken phase, are fully described by the theory.



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